Possibly. Government agencies (Australia most recently) are starting to require citizens to use e-mail addresses from "trusted" partners. Google is one of those partners.

Well this is certainly news. Lots of us use self hosted email or just whitelabelled domains. Can you link to a source or more info?

I'm pretty sure that already in 2019 losing a linkedin accout might have serious effect on your career. Not completely unemployable, of course but this could have significant impact in some industries

I don't think this is true at all, or at least not outside of certain niches. I deleted my LinkedIn account years ago, and doing that had exactly no discernable impact on my career.

It means I'd stop getting bothered by clueless recruiters multiple times per day, which can only be a net benefit.

It's completely possible to get a job without a LinkedIn account.